Claims
- 1. A high-speed image acquisition system comprising:
a sensor movable relative to a target; an illuminator adapted to direct illumination upon the target at a plurality of illumination levels; wherein the sensor obtains a first set of at least one image at a first illumination level during relative motion between the sensor and the target, and the sensor obtains a second set of at least one image at a second illumination level of the plurality of illumination levels during relative motion between the sensor and the target; wherein the first and second illumination levels differ from each other by a known ratio, and wherein an unusable portion from one set of at least one image is replaced based upon the other set of at least one image and the known ratio; and an image processor coupled to the sensor and adapted to create an extended dynamic range image based at least in part upon cositing the first set of at least one image with the second set of at least one image.
- 2. The system of claim 1, wherein the illuminator is a stroboscopic illuminator.
- 3. The system of claim 2, wherein the illuminator is a gas discharge strobe.
- 4. The system of claim 1, wherein the illuminator is movable relative to the target.
- 5. The system of claim 1, and further comprising a position measurement system coupled to the sensor, the position measurement system providing an indication to the image processor relative to displacement occurring between acquisition of the first and second sets.
- 6. The system of claim 5, wherein the image processor registers the first and second sets based upon the indication.
- 7. The system of claim 6, wherein the image processor registers the first and second sets based upon image processing of the first and second sets.
- 8. The system of claim 1, wherein the target is an electrical component.
- 9. The system of claim 1, wherein the target is a package of an electrical component.
- 10. A high-speed inspection system comprising:
a source disposed to project light upon a target at a plurality of illumination levels; an imaging system for acquiring a plurality of sets of at least one image, wherein a first set is related to a first illumination level of the plurality of illumination levels, and a second set is related to a second illumination level of the plurality of illumination levels, during relative movement between the imaging system and the target; and a processor for processing the acquired images to generate inspection information with an extended dynamic range.
- 11. The system of claim 10, wherein the source is adapted to project patterned illumination.
- 12. The system of claim 11, wherein the pattern is a sinusoidal fringe pattern.
- 13. The system of claim 12, wherein the first set of at least one image includes three images acquired at phases that are substantially p, p+120 and p+240 degrees of the sinusoidal function.
- 14. The system of claim 13, wherein the first set is acquired within one millisecond.
- 15. The system of claim 13, wherein the second set of at least one image includes three images acquired at phases that are substantially p+360n, p+360n+120, and p+360n+240 degrees of the sinusoidal function, where n is an integer.
- 16. The system of claim 15, wherein the second set is acquired within one millisecond.
- 17. The system of claim 10, wherein the source is a strobe.
- 18. The system of claim 17, wherein the source includes a gas discharge flashlamp.
- 19. The system of claim 18, wherein the source is a xenon arc flashlamp.
- 20. The system of claim 10, wherein the first and second sets of images are registered using image processing techniques.
- 21. The system of claim 10, and further comprising a system for measuring displacement between the imaging system and the target during the interval between acquisition of the first and second sets, and wherein the first and second sets are registered based at least in part upon the measured displacement.
- 22. The system of claim 10, and further comprising an illumination sensor for sensing the first and second illumination levels to provide a ratio therebetween.
- 23. The system of claim 22, wherein the processor registers the first and second sets to create a composite set.
- 24. The system of claim 22, wherein portions of images in one set are replaced by portions of images in the other set by normalizing the portions in the other set using the ratio.
- 25. The system of claim 10, and further comprising an illumination sensor for sensing the first and second illumination levels to provide a difference therebetween.
- 26. The system of claim 25, wherein the processor registers the first and second sets to create a composite set.
- 27. The system of claim 25, wherein portions of images in one set are replaced by portions of images in the other set by normalizing the portions in the other set using the ratio.
- 28. A method of inspecting a target with a high-speed inspection system, the method comprising:
obtaining a first image of the target at a first illumination level with a sensor while the sensor and target move relative to each other; obtaining a second image of the target at a second illumination level with the sensor while the sensor and target move relative to each other, wherein the first and second illumination levels differ from each other by a known amount; replacing an unusable portion of one of the first and second images with a corresponding portion of the other of the first and second images by normalizing the corresponding portion based upon the known amount of difference in illumination levels, to create a composite image; and processing the composite image to generate inspection information relative to the target.
CROSS REFERENCE TO CO-PENDING APPLICATION
[0001] This application is a Continuation-in-Part application of U.S. patent application Ser. No. 09/522,519, filed Mar. 10, 2000, and entitled “Inspection System with Vibration Resistant Video Capture,” which claims priority benefits from U.S. Provisional patent application Serial No. 60/175,049, filed Jan. 7, 2000 and entitled “Improved Inspection Machine.”
Provisional Applications (1)
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Number |
Date |
Country |
|
60175049 |
Jan 2000 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09522519 |
Mar 2000 |
US |
Child |
10217910 |
Aug 2002 |
US |